苏州混凝土水泥制品研究院有限公司

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发布时间:2020-01-06 00:00:00
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杂志简介

主办单位: 苏州混凝土水泥制品研究院
中国混凝土与水泥制品协会
  • 主编 : 李建华
  • 常务副主编 : 王春蓉
  • 刊期 : 月刊
  • 电话 : 0512-68285716
  • E-mail : sccpitg@126.com
  • 国内统一刊号(CN) : 32-1173/TU
  • 国际标准刊号(ISSN) : 1000-4637
  • 邮发代号 : 28-80
hunnitu 微信公众号
hunnitu 扫码订购杂志

混凝土研究

利用DOE和紧密堆积理论优化UHPC设计
利用DOE和紧密堆积理论优化UHPC设计
  • 李火星,孔祥付,李伯川,胡 建
2024年第3期
摘要
引用本文
摘   要:使用DOE设计理论,根据所选原材料的性能和产品工艺要求先设定基础参数和优化目标,再基于颗粒紧密堆积理论(MAA)得到标准预混料的配合比;然后利用全因子试验筛选重要因子并确定极值范围后进行响应面模型分析;最后输出得到符合使用要求的超高性能混凝土(UHPC)配合比。验证试验结果表明:优化配合比后,所配制的UHPC流动度和密实度预测值均在误差范围内,结果较可靠。 Abstract: Adopting DOE design theory, firstly, the basic parameters and optimization objectives were set according to the selected raw material properties and product process requirements. Then the mix proportion of standard premix was obtained based on the theory of compact accumulation of particles(MAA), and the response surface model analysis was carried out by using the full factorial test to screen the important factors and to determine the range of extremes, and the output was obtained to obtain the mix proportion of ultra-high performance concrete(UHPC) that meet the requirements for use. The verification test results show that the predicted values of flowability and compactness of UHPC prepared by optimizing the mix proportion are within the error range, and the results are relatively reliable.
李火星,孔祥付,李伯川,等.利用DOE和紧密堆积理论优化UHPC设计[J].混凝土与水泥制品,2024(3):1-6. LI H X,KONG X F,LI B C,et al.Optimized design of UHPC based on DOE and MAA[J].China Concrete and Cement Products,2024(3):1-6.
石粉含量对C60机制砂混凝土徐变的影响
石粉含量对C60机制砂混凝土徐变的影响
  • 盖珂瑜1,2,韩江龙1,3,*,王永宝3,吴柏翰2
2024年第3期
摘要
引用本文
摘   要:研究了不同石粉含量对C60机制砂混凝土徐变的影响,并对现有徐变预测模型进行了对比分析。结果表明:当机制砂石粉含量不超过15%时,各组试件的抗压强度均可满足C60强度等级的要求,各组试件120 d的徐变应变约为(180~230)×10-6,徐变系数在0.41~0.56之间;随着石粉含量的增加,各组试件的徐变应变呈现先减小后增大的趋势,徐变系数呈先增大后减小的趋势;石粉含量对C60机制砂混凝土徐变的影响不显著;现有徐变模型对徐变系数的计算结果均大于实测结果;相比较之下,fib MC 2010模型更适用于高强机制砂混凝土的徐变预测。 Abstract: The effect of different contents of stone powder on the creep of C60 manufactured sand concrete was studied, and a comparative analysis of existing creep prediction models was conducted. The results show that when the stone powder contents of concrete with manufactured sand do not exceed 15%, the compressive strength of each group of specimens can meet the requirements of C60 strength grade, and the creep strain of each group of specimens at 120 d is about (180~230)×10-6, with a creep coefficient from 0.41 to 0.56. With the increase of stone powder content, the creep strain of each group of specimens shows a trend of first decreasing and then increasing, and the creep coefficient shows a trend of first increasing and then decreasing. The effect of stone powder content on the creep of C60 manufactured sand concrete is not significant. The calculation results of existing creep models for creep coefficients are all greater than the measured results. By comparison, the fib MC 2010 model is more suitable for predicting the creep of high-strength manufactured sand concrete.
盖珂瑜,韩江龙,王永宝,等.石粉含量对C60机制砂混凝土徐变的影响[J].混凝土与水泥制品,2024(3):7-11. GE K Y,HAN J L,WANG Y B,et al.Influence of the stone powder content on the creep of C60 manufactured sand concrete[J].China Concrete and Cement Products,2024(3):7-11.
纳米C-S-H早强剂对水泥水化的影响研究
纳米C-S-H早强剂对水泥水化的影响研究
  • 王可汗1,李 伟1,2,郑春扬1,吉 飞1,孔祥发1,王学川1
2024年第3期
摘要
引用本文
摘   要:通过凝结时间、水化温度、XRD、SEM、抗压强度试验等研究了纳米C-S-H早强剂对水泥水化及混凝土强度的影响,并分析了作用机理。结果表明:纳米C-S-H早强剂明显缩短了水泥的凝结时间;随着纳米C-S-H早强剂掺量的增加,水化温度峰出现时间缩短,且峰值提高;掺入适量的纳米C-S-H早强剂不改变水泥的水化产物种类,但加速了水泥水化进程,提高了混凝土的早期抗压强度,且后期(28 d、56 d)抗压强度无倒缩。 Abstract: The influence of nano C-S-H early strength agent on cement hydration and concrete strength was studied through setting time, hydration temperature, XRD, SEM, and compressive strength tests, and the mechanism of the action was analyzed. The results show that the nano C-S-H early strength agent significantly shortens the setting time of cement. With the increase of the content of nano C-S-H early strength agent, the time for the hydration temperature peak to appear is shortened, and the temperature peak increases. The suitable addition of nano C-S-H early strength agent does not change the type of hydration products in cement, but accelerates the cement hydration process, improves the early compressive strength of concrete, and there is no shrinkage in the later(28 d、56 d) compressive strength.
王可汗,李伟,郑春扬,等.纳米C-S-H早强剂对水泥水化的影响研究[J].混凝土与水泥制品,2024(3):12-15,20. WANG K H,LI W,ZHENG C Y,et al.Research on the influence of nano C-S-H early strength agent on cement hydration[J].China Concrete and Cement Products,2024(3):12-15,20.
高性能聚合物砂浆的制备与性能研究
高性能聚合物砂浆的制备与性能研究
  • 毕承伟1,卢立群2,缪志勇2,钱玉德2,王星尧3,陈 伟2,孙德文3
2024年第3期
摘要
引用本文
摘   要:采用定向级配复合技术优化了河砂级配,再采用响应曲面法构建了聚合物砂浆性能预测模型,并对聚合物砂浆的配合比进行了优化。此外,研究了原材料组分交互作用对聚合物砂浆性能的影响,并建立了聚合物砂浆7 d抗折、抗压强度与水泥掺量、膨胀剂掺量、胶粉掺量的二阶响应曲面模型。结果表明:高性能聚合物砂浆的最佳配合比为水泥掺量420 g、膨胀剂掺量10 g、胶粉掺量20 g,以此配合比制备的高性能聚合物砂浆7 d抗折、抗压强度分别可达8.4 MPa、55.7 MPa。 Abstract: The directional gradation composite technology was used to optimize the river sand gradation, and the response surface method was used to construct a performance prediction model for polymer mortar, and the mix proportion of polymer mortar was optimized. In addition, the influence of raw material component interaction on the performance of polymer mortar was studied, and a second-order response surface model was established for the 7 d flexural and compressive strength of polymer mortar with cement, expansion agent, and rubber powder dosage. The results show that the optimal mix proportion for high performance polymer mortar is 420 g of cement, 10 g of expansion agent, and 20 g of adhesive powder, and the high performance polymer mortar prepared from this mix proportion can achieve a 7 d flexural and compressive strength of 8.4 MPa and 55.7 MPa.
毕承伟,卢立群,缪志勇,等.高性能聚合物砂浆的制备与性能研究[J].混凝土与水泥制品,2024(3):16-20. BI Chengwei, LU Liqun, MIAO Zhiyong,et al.Preparation and performance research of high performance polymer Mortar[J].China Concrete and Cement Products,2024(3):16-20.
基于非接触电阻率测量法的水泥基材料早期水化特性研究
基于非接触电阻率测量法的水泥基材料早期水化特性研究
  • 于超胜
2024年第3期
摘要
引用本文
摘   要:采用非接触电阻率测量法,基于电阻率与温差曲线,研究了硅灰掺量(5%、10%)和粉煤灰掺量(20%、40%)对水泥基材料早期水化的影响。结果表明:掺粉煤灰组水泥浆体的电阻率在约580 min前高于C组(基准组),在580 min后低于C组,而掺硅灰组水泥浆体正相反,在580 min后,掺硅灰组水泥浆体的电阻率高于C组;与C组相比,掺入粉煤灰后,水泥浆体的放热量减少,放热峰对应的时间延迟,而掺入硅灰后,水泥浆体的水化反应明显加快,放热峰对应的时间也随着硅灰掺量的增加而提前;相比于C组,掺粉煤灰组水泥浆体的凝结时间略微延长,掺硅灰组水泥浆体的凝结时间缩短;相较于掺入粉煤灰,掺入硅灰可以促进水泥水化,使水泥浆体微观结构更加致密。 Abstract: The influence of silica fume content(5%, 10%) and fly ash content(20%, 40%) on early hydration of cement-based materials was studied by combining non-contact resistivity measurement based on resistivity and temperature difference curves. The results show that the electrical resistivity of the cement slurry mixed with fly ash is higher than that of group C (benchmark group) before about 580 min, and lower than that of group C after 580 min, while the electrical resistivity of the cement slurry mixed with silica fume is the opposite. After 580 min, the electrical resistivity of the cement slurry mixed with silica fume is higher than that of group C. Compared with group C, the addition of fly ash reduces the heat release of the cement slurry and delays the time corresponding to the heat release peak. However, the addition of silica fume significantly accelerates the hydration reaction of the cement slurry, and the time corresponding to the heat release peak also advances with the increase of silica fume content. Compared to group C, the setting time of the cement slurry in the fly ash group is slightly longer, while the setting time of the cement slurry in the silica ash group is shorter. Compared to adding fly ash, adding silica fume can promote cement hydration and make the microstructure of cement slurry more compact.
于超胜.基于非接触电阻率测量法的水泥基材料早期水化特性研究[J].混凝土与水泥制品,2024(3):21-25. YU C S.Study on early hydration characteristics of cement-based materials based on non-contact resistivity measurement[J].China Concrete and Cement Products,2024(3):2024(3):21-25.
仿木水泥基材料的发展研究综述
仿木水泥基材料的发展研究综述
  • 庞超明1,厉彦浩1,高仁辉2,陈嘉俊1
2024年第3期
摘要
引用本文
摘   要:根据木材特性,结合现有水泥基材料着色、轻质化、强韧化和功能化四方面技术,可以制备出成本低、性能优、安全性高、轻质高比强的仿木水泥基复合材料,实现多维度性能的“仿木”。此外,对仿木水泥基材料的密度、强度、导热系数、颜料选择等指标提出了建议,并对未来的研究方向进行了展望。 Abstract: Based on the characteristics of wood, combined with existing cementitious materials coloring, lightweighting, toughening, and functionalization technologies, low-cost, high-performance, high safety, lightweight, and high strength specific woodcrete can be prepared, achieving multi-dimensional performance of "wood like". In addition, suggestions are made for the density, strength, thermal conductivity, pigment selection and other indicators of woodcrete, and future research directions are also discussed.
庞超明,厉彦浩,高仁辉,等.仿木水泥基材料的发展研究综述[J].混凝土与水泥制品,2024(3):26-30. PANG Chaoming, LI Yanhao, GAO Renhui,Review of the development and research on woodcrete[J].China Concrete and Cement Products,2024(3):26-30.
骨料中的黄铁矿反应及其对胶砂试件的破坏机理研究
骨料中的黄铁矿反应及其对胶砂试件的破坏机理研究
  • 李叶青,王云摇*,马 黎,郑赟昊,余松柏
2024年第3期
摘要
引用本文
摘   要:研究了不同条件下(干燥环境、自然环境、干湿循环、冻融循环),用含黄铁矿细骨料制备的胶砂试件中黄铁矿反应及其对试件的破坏机理。结果表明:干燥环境下,黄铁矿反应较弱,自然环境、干湿循环、冻融循环条件下,黄铁矿反应较强;自然环境下,黄铁矿氧化,造成延迟型钙矾石和铁锈膨胀型破坏;干湿循环条件下,黄铁矿反应形成的石膏溶出,无延迟钙矾石形成,破坏形式以铁锈膨胀破坏为主;冻融循环条件下,黄铁矿反应形成延迟型钙矾石,但氧化不充分,生成四氧化三铁。 Abstract: The reaction of pyrite in rubber sand specimens prepared from pyrite containing fine aggregates under different conditions (dry environment, natural environment, dry-wet cycle, freeze-thaw cycle) and its damage mechanism on the specimens were studied. The results show that in dry environments, the reaction of pyrite is weak, while in natural environment, wet-dry cycles, and freeze-thaw cycles, the reaction of pyrite is strong. Under natural conditions, pyrite oxidizes, causing delayed ettringite and rust expansion damage. Under dry-wet cycle conditions, gypsum formed by pyrite reaction dissolves without delayed ettringite formation, and the main form of destruction is rust expansion and destruction. Under freeze-thaw cycle conditions, pyrite reacts to form delayed ettringite, but the oxidation is not sufficient, resulting in the formation of magnetite.
李叶青,王云摇,马黎,等.骨料中的黄铁矿反应及其对胶砂试件的破坏机理研究[J].混凝土与水泥制品,2024(3):31-35,42. LI Y Q,WANG Y Y,MA L,et al.Research on the reaction of pyrite in aggregates and its damage mechanism on mortar specimens[J].China Concrete and Cement Products,2024(3):31-35,42.
水泥基渗透结晶型材料与纳米材料对混凝土性能的影响
水泥基渗透结晶型材料与纳米材料对混凝土性能的影响
  • 杜英欣1,2,马再禹1,任广毅1,王正君1,*,刘瑛文3
2024年第3期
摘要
引用本文
摘   要:研究了水泥基渗透结晶型材料(XYPEX掺合剂)与纳米材料复掺(纳米CaCO3)对混凝土性能的影响。结果表明:适量XYPEX掺合剂与纳米CaCO3复掺可以改善混凝土的性能;3.0%的XYPEX掺合剂与0.5%的纳米CaCO3复掺可以显著提高混凝土的抗压强度;2.0%的XYPEX掺合剂与0.5%的纳米CaCO3复掺可以显著提高混凝土的早期劈裂抗拉强度;1.0%的XYPEX掺合剂与1.0%的纳米CaCO3复掺时,混凝土的抗冻性能最佳。 Abstract: The effect of cement based permeable crystalline materials(XYPEX admixture) and nano-material composite(nano CaCO3) on the performance of concrete was studied. The results show that the combination of XYPEX admixture and nano CaCO3 can improve the performance of concrete. The combination of 3.0% XYPEX admixture and 0.5% nano CaCO3 can significantly improve the compressive strength of concrete. The combination of 2.0% XYPEX admixture and 0.5% nano CaCO3 can significantly improve the early splitting tensile strength of concrete. When 1.0% XYPEX admixture is combined with 1.0% nano CaCO3, the frost resistance of concrete is the best.
杜英欣,马再禹,任广毅,等.水泥基渗透结晶型材料与纳米材料对混凝土性能的影响[J].混凝土与水泥制品,2024(3):36-42. DU Y X,MA Z Y,REN G Y,et al.Influence of cement based permeable crystalline materials and Nano-materials on the properties of concrete[J].China Concrete and Cement Products,2024(3):36-42.

水泥混凝土制品

装配式地铁车站单面叠合侧墙受力性能试验研究
装配式地铁车站单面叠合侧墙受力性能试验研究
  • 卞 波1,2,莫振泽1,2,周梓彬1,3,杨智学4,李婉清5
2024年第3期
摘要
引用本文
摘   要:为提高地铁车站施工效率,研发了装配式地铁车站单面叠合侧墙,分别制作了缩尺比例为1∶2的叠合试件和现浇试件,并进行了抗弯试验。结果表明:现浇试件和叠合试件呈现出相同的破坏形态,两者的荷载-挠度曲线基本接近,抗弯性能相近;叠合试件的叠合面未出现明显破坏,且截面钢筋应变分布仍满足平截面假定,叠合试件的整体性较好;装配式地铁车站单面叠合侧墙具有“等同现浇”的受力性能,可应用于实际工程。 Abstract: In order to improve the construction efficiency of metro station, a single-sided laminated side wall of assembled metro station was developed. A laminated and cast-in-place specimens were made with a scale ratio of 1∶2, and bending tests were conducted. The test results show that the laminated and cast-in-place specimens have the same damage pattern, and the load-deflection curves are basically close to each other, which have the similar bending performance. No obvious damage occurrs on the surface of the laminated specimen, and the strain distribution of the section reinforcement still satisfies the assumption of flat section, indicating that the integrity of the specimen force is good. The single-sided laminated side wall of assembled metro stations has the "equivalent cast-in-place" mechanical performance and can be safely applied to the actual project.
卞波,莫振泽,周梓彬,等.装配式地铁车站单面叠合侧墙受力性能试验研究[J].混凝土与水泥制品,2024(3):39-42. BIAN B,MO Z Z,ZHOU Z B,et al.Experimental study on mechanical properties of single-sided laminated side walls of assembled metro station[J].China Concrete and Cement Products,2024(3):39-42.
新型钢节点装配式混凝土梁力学性能及破坏机制研究
新型钢节点装配式混凝土梁力学性能及破坏机制研究
  • 吴东平,杨志宇,李成玉
2024年第3期
摘要
引用本文
摘   要:由于传统装配式混凝土梁运输和施工难度大,提出了一种新型钢节点装配式混凝土梁,并试制了1根现浇梁试件与3根装配式梁试件,通过抗弯静载试验,对比研究了新型钢节点对装配式梁试件力学性能及其破坏机制的影响。根据试验情况,采用ABAQUS有限元软件进行了试件破坏模拟,并与试验结果进行了对比分析。结果表明:装配式梁试件可达到现浇梁的承载力水平;新型钢节点的钢端板厚度对装配式梁试件的整体承载力影响较大,当钢端板尺寸在一定范围内时,装配式梁试件的承载能力优于现浇梁;新型钢节点对混凝土的破坏形式影响较大,其梁纯弯段裂缝不同于现浇梁的受弯竖向裂缝,表现为弯剪斜向裂缝;有限元模拟结果与试验结果相吻合,可用于装配式梁试件的后续研究。 Abstract: Due to the high difficulty in transportation and construction of traditional prefabricated concrete beams, a new type of assembled concrete beam with steel nodes was proposed. One cast-in-place beam specimen and three assembled beam specimens were fabricated on a trial basis to investigate the practicality of such assembled beams, the effect of new type steel nodes on the mechanical performance of concrete beams, and their influence on the damage of concrete through flexural static load tests. ABAQUS finite element simulation was used to compare and analyze the test results according to the test conditions. The results show that the new type of assembled beam can reach the level of load-bearing of cast-in-place beam. The thickness of the steel end plate in the node part has a greater impact on the overall load-bearing capacity of the beam, and the load-bearing capacity of this assembled concrete beam is better than that of cast-in-place beam when the size of the steel end plate reaches a certain level. New type of steel node has a greater impact on the destruction of concrete. The pure bending section crack of the beam is different from the bending vertical crack of the cast-in-place beam, which is the bending shear diagonal crack. The finite element simulation results coincide with the test results, which can be used for subsequent research on prefabricated beam specimens.
吴东平,杨志宇,李成玉.新型钢节点装配式混凝土梁力学性能及破坏机制研究[J].混凝土与水泥制品,2024(3):43-48,52. WU D P,YANG Z Y,LI C Y.Research on mechanical properties and damage mechanism of new steel-node assembled concrete beams[J].China Concrete and Cement Products,2024(3):43-48,52.

纤维材料及制品

耐碱玻纤的优选及其对高性能混凝土性能的影响
耐碱玻纤的优选及其对高性能混凝土性能的影响
  • 张立力1,杨婷丽1,李宏伟2,曹鑫铖1,夏如茜1,潘从玲1
2024年第3期
摘要
引用本文
摘   要:通过碱溶液浸泡和胶砂强度试验,从8种耐碱玻纤中优选出了1种综合性能相对较好的耐碱玻纤,在此基础上,研究了耐碱玻纤的体积掺量(0、0.05%、0.10%、0.20%、0.40%、0.80%)和养护制度(蒸汽养护56 h、标准养护7 d)对C80、C95高性能混凝土工作性和力学性能的影响。结果表明:TS耐碱玻纤在碱溶液中浸泡96 h后表面无裂痕,且掺TS耐碱玻纤胶砂的28 d抗折、抗压强度相对较高;随着TS耐碱玻纤掺量的增加,C80、C95混凝土的工作性和抗压强度下降,抗折强度基本呈增大趋势;蒸汽养护试件的抗压、抗折强度比标准养护试件的高。 Abstract: Through alkaline solution immersion and mortar strength tests, one alkali resistant glass fiber with relatively good comprehensive performance was selected from eight types of alkali resistant glass fiber. Based on this, the effects of the volume content (0, 0.05%, 0.10%, 0.20%, 0.40%, 0.80%) of alkali resistant glass fiber and curing system (steam curing for 56 h and standard curing for 7 d) on the workability and mechanical properties of C80 and C95 high performance concrete were studied. The results show that there are no cracks on the surface of TS alkali resistant glass fiber after soaking in alkaline solution for 96 h, and the 28 d flexural and compressive strength of mortar with TS alkali resistant glass fiber are relatively high. With the increase of TS alkali resistant glass fiber content, the workability and compressive strength of C80 and C95 concrete decrease, while the flexural strength basically shows an increasing trend. The compressive and flexural strength of steam cured specimens are higher than those of standard cured specimens.
张立力,杨婷丽,李宏伟,耐碱玻纤的优选及其对高性能混凝土性能的影响[J].混凝土与水泥制品,2024(3):49-52. ZHANG L L,YANG T L,LI H W,et al.Optimization of alkali resistant glass fiber and its influence on performance of high performance concrete[J].China Concrete and Cement Products,2024(3):49-52.
聚丙烯纤维橡胶混凝土的力学及抗冻性能研究
聚丙烯纤维橡胶混凝土的力学及抗冻性能研究
  • 苏有文,杨 戟*,吕雄飞
2024年第3期
摘要
引用本文
摘   要:研究了聚丙烯纤维的体积掺量(0.45%、0.90%、1.35%、1.80%、2.25%、3.41%、4.51%)对橡胶混凝土力学及抗冻性能的影响,并建立了冻融损伤劣化模型来预测橡胶混凝土的冻融损伤劣化规律。结果表明:掺入适量聚丙烯纤维可以有效提高橡胶混凝土的力学及抗冻性能,当聚丙烯纤维掺量在1.80%~2.25%范围内时,试件的力学及抗冻性能均较好;建立的冻融损伤劣化模型的拟合系数R2均大于0.992,拟合精度较高,可为聚丙烯纤维橡胶混凝土在寒冷地区工程中的应用提供理论依据。 Abstract: The effect of volume content of polypropylene fiber (0.45%, 0.90%, 1.35%, 1.80%, 2.25%, 3.41%, 4.51%) on the mechanical properties and frost resistance of rubber concrete was investigated, and a freeze-thaw damage deterioration model was established to predict the freeze-thaw damage deterioration law of rubber concrete in freeze-thaw environment. The results show that an appropriate content of polypropylene fiber can significantly improve the mechanical properties and frost resistance of rubber concrete, and the mechanical properties and frost resistance of rubber concrete are better when the content of polypropylene fiber is 1.80%~2.25%. The fitting coefficients R2 of the established freeze-thaw damage deterioration model is more than 0.992, and the fitting accuracy is high, which can provide theoretical basis for the application of polypropylene fiber rubber concrete in cold region engineering.
苏有文,杨戟,吕雄飞.聚丙烯纤维橡胶混凝土的力学及抗冻性能研究[J].混凝土与水泥制品,2024(3):53-56,61. SU Y W,YANG J,LYU X F.Study on mechanical properties and frost resistance of polypropylene fiber rubber concrete[J].China Concrete and Cement Products,2024(3):53-56,61.
不同掺合料对喷射钢纤维混凝土性能的影响
不同掺合料对喷射钢纤维混凝土性能的影响
  • 翟军强1,李向龙1,周霄骋2,秦世杰3,*,秦鸿根2
2024年第3期
摘要
引用本文
摘   要:依托某重点工程隧道穹顶支护用高性能喷射混凝土的性能要求,配制了C40喷射钢纤维混凝土,研究了掺合料的种类(粉煤灰、专用掺合料、抗裂剂)对喷射钢纤维混凝土工作性、力学性能和耐久性能的影响。结果表明:掺不同掺合料喷射钢纤维混凝土的坍落度均满足(180±20)mm的要求,表观密度稳定在2 530 kg/m3左右,抗压强度均满足设计强度等级要求,耐久性能均较好;另外,与掺粉煤灰的喷射钢纤维混凝土相比,掺专用掺合料或抗裂剂的喷射钢纤维混凝土的保水性和黏聚性均较好,力学性能和耐久性能基本均较优,抗渗等级分别达到了P11和P10,28 d碳化深度均小于12.0 mm。 Abstract: Based on the performance requirements of high-performance shotcrete for tunnel dome support in a key engineering project, C40 shotcrete with steel fibers was prepared. The effects of different types of admixtures (fly ash, special admixtures, anti-cracking agents) on the workability, mechanical properties, and durability of shotcrete with steel fibers were studied. The results show that the slump of shotcrete with steel fibers mixed with different admixtures meets the requirement of (180±20)mm, the apparent density remains stable at around 2 530 kg/m3, the compressive strength meets the design strength grade requirements, and the durability performance is good. In addition, compared with the shotcrete with steel fibers mixed with fly ash, the shotcrete with steel fibers mixed with special admixtures or anti-cracking agents has better water retention and cohesion, and basically better mechanical properties and durability, and the impermeability level reaches P11 and P10 respectively, and the 28 d carbonation depth is less than 12.0 mm.
翟军强,李向龙,周霄骋,等.不同掺合料对喷射钢纤维混凝土性能的影响[J].混凝土与水泥制品,2024(3):57-61. ZHAI J Q,LI X L,ZHOU X C,et al.Effect of different admixtures on the properties of shotcrete with steel Fibres[J].China Concrete and Cement Products,2024(3):57-61.
聚丙烯纤维和塑钢纤维对TC20透水混凝土性能的影响
聚丙烯纤维和塑钢纤维对TC20透水混凝土性能的影响
  • 周敬山,林新周,刘向坤
2024年第3期
摘要
引用本文
摘   要:通过研究单掺和复掺粉煤灰与矿粉对透水混凝土力学及透水性能的影响,优选出了TC20透水混凝土的最佳配合比,并在此基础上,对比研究了分别单掺0.05%、0.10%、0.15%、0.20%的塑钢纤维和聚丙烯纤维对透水混凝土力学、透水和抗冻性能的影响。结果表明:掺入适量粉煤灰、矿粉增大了透水混凝土的抗压强度、孔隙率和透水系数;与聚丙烯纤维相比,掺塑钢纤维试件的抗压强度、孔隙率、透水系数均较高,抗冻性能较好。综合考虑透水混凝土的抗压强度、透水性能和抗冻性能,推荐复掺15%粉煤灰与15%矿粉,并掺加不超过0.10%的塑钢纤维。 Abstract: The effects of single and composite addition of fly ash and mineral powder on the mechanical properties and permeability of pervious concrete were studied, and the best mix proportion for TC20 pervious concrete was selected. On this basis, the effects of single addition of 0.05%, 0.10%, 0.15% and 0.20% plastic steel fiber and polypropylene fiber alone on the mechanical properties, permeability and frost resistance of pervious concrete were comparatively studied. The results show that the compressive strength, porosity and water permeability coefficient of pervious concrete are increased by the addition of appropriate content of fly ash and mineral powder. Compared with polypropylene fiber, the compressive strength, porosity and water permeability coefficient of the specimens mixed with plastic steel fiber are higher, and the frost resistance is better. Comprehensively considering the compressive strength, permeability and frost resistance of pervious concrete, it is recommended to mix 15% content of fly ash and 15% content of mineral powder, and add no more than 0.10% content of plastic steel fiber.
周敬山,林新周,刘向坤.聚丙烯纤维和塑钢纤维对TC20透水混凝土性能的影响[J].混凝土与水泥制品,2024(3):62-65. ZHOU J S,LIN X Z,LIU X K.Effect of polypropylene fiber and plastic steel fiber on performance of TC20 pervious concrete[J].China Concrete and Cement Products,2024(3):62-65.

房建材料及制品

盾构泥对加气混凝土性能的影响研究
盾构泥对加气混凝土性能的影响研究
  • 刘 涛,张阿瑶,杨 萍,华靖文
2024年第3期
摘要
引用本文
摘   要:研究了不同掺量盾构泥等质量取代硅砂对加气混凝土发气时间、硬化时间、外观颜色、抗压强度和干表观密度的影响。结果表明:SiO2含量不低于45%的盾构泥可替代部分硅砂用于生产加气混凝土;一定掺量范围内,随着盾构泥掺量的增加,加气混凝土坯体的发气时间、硬化时间均变长,抗压强度降低;盾构泥的掺加会导致加气混凝土制品外观颜色变深;为确保加气混凝土制品的物理力学性能,需控制盾构泥的掺量。 Abstract: The effects of different contents of shield tunneling mud for equal mass silica sand on the aeration time, hardening time, appearance color, compressive strength, and dry apparent density of aerated concrete were studied. The results show that shield tunneling mud with a SiO2 content of no less than 45% can replace silica sand to produce the aerated concrete. Within a certain content range, as the content of shield tunneling mud increases, the aeration time and hardening time of the aerated concrete embryo become longer, and the compressive strength decreases. The addition of shield tunneling mud can cause the appearance color of aerated concrete products be darker. To ensure the physical and mechanical properties of aerated concrete products, it is necessary to control the content of shield tunneling mud.
刘涛,张阿瑶,杨萍,等.盾构泥对加气混凝土性能的影响研究[J].混凝土与水泥制品,2024(3):66-68. LIU T,ZHANG A Y,YANG P,et al.Research on the influence of shield tunneling mud on the performance of aerated concrete[J].China Concrete and Cement Products,2024(3):66-68.
浆体流变性对透水型泡沫混凝土性能的影响
浆体流变性对透水型泡沫混凝土性能的影响
  • 凌建祥1,董 波1,叶 焕2,*
2024年第3期
摘要
引用本文
摘   要:为提高透水型泡沫混凝土的透水能力、蓄水能力,研究了浆体流变性能对该类混凝土孔结构、透水性、蓄水性的影响。结果表明:当浆体的初始屈服应力小于3.0 Pa时,透水型泡沫混凝土易发生塌模;随着浆体屈服应力与黏度的增大,透水型泡沫混凝土的透水性和蓄水性降低;通过控制浆体的流变性,可以制备出干表观密度700 kg/m3、透水性为K2~K3级、体积蓄水率40%的透水型泡沫混凝土。 Abstract: To improve the water permeability and water storage capacity of pervious foamed concrete, the effects of rheological property of paste on the pore structure, water permeability and water storage properties of pervious foamed concrete were studied. The results show that the foamed concrete is prone to collapse when the initial yield stress is less than 3.0 Pa. The increase of yield stress and viscosity reduces the water permeability and water retention of pervious foamed concrete. A pervious foamed concrete with a dry apparent density of 700 kg/m3, a water permeability of K2~K3, and a volume water retention rate of 40% can be prepared by controlling the rheology of the paste.
凌建祥,董波,叶焕.浆体流变性对透水型泡沫混凝土性能的影响[J].混凝土与水泥制品,2024(3):69-73. LING J X,DONG B,YE H.Effect of rheological properties on the properties of pervious foamed concrete[J].China Concrete and Cement Products,2024(3):69-73.

标准解读

JC/T 2723—2022《预应力混凝土实心方桩》标准解读
JC/T 2723—2022《预应力混凝土实心方桩》标准解读
  • 蒋元海
2023年第4期
摘要
引用本文
为便于 JC/T 2723—2022《预应力混凝土实心方桩》的使用方准确理解标准条款的具体含义,正确贯彻实施标准条款的具体要求和规定,简述了该标准的编制背景、编制目的和意义,解释说明了标准条文的具体内容,并指出了标准实施过程中应注意的事项。 In order to facilitate the user of JC/T 2723—2022 Prestressed Concrete Solid Square Pile to accurately understand the specific meaning of the standard terms and correctly implement the specific requirements and provisions of the standard terms, the preparation background, purpose and significance of the JC/T 2723—2022 are briefly described, the specific contents of the standard provisions are explained in detail, and the problems that should be paid attention to in the implementation process are put forward.
蒋元海.JC/T 2723—2022《预应力混凝土实心方桩》标准解读[J].混凝土与水泥制品,2023(4):81-84. JIANG Y H.Interpretation on JC/T 2723—2022 Prestressed Concrete Solid Square Pile[J].China Concrete and Cement Products,2023(4):81-84.

检测及试验方法研究

灌浆料测强曲线对龄期与抗压强度的适用性研究
灌浆料测强曲线对龄期与抗压强度的适用性研究
  • 赵建华1,谢慧晟2,张建宇1,凌良建2,周红燕3,吕 嘉2
2023年第4期
摘要
引用本文
选择不同灌浆料制作了标准试件和模拟孔道PVC管试件,根据DB32/T 3754—2020《装配整体式混凝土结构检测技术规程》的要求,基于标准试件的抗压强度和模拟孔道PVC管试件的表面硬度建立了灌浆料测强曲线,分析了测强曲线对灌浆料龄期和抗压强度的适用性。结果表明:在灌浆料龄期≥14 d或抗压强度≥60 MPa的情况下,采用DB32/T 3754—2020中的方法建立的灌浆料测强曲线的适用性更强,可为实际工程中不同灌浆料实体抗压强度检测时间的选取提供参考。 Different sleeve grouting materials were selected to make standard test pieces and PVC pipe test pieces with simulated channels. According to the requirements of DB32/T 3754—2020 Technical Specification for Inspection of Monolithic Precast Concrete Structure, the strength curve of the grouting material was established based on the compressive strength of standard test pieces and the surface hardness of PVC pipe test pieces with simulated channels, and the applicability of the strength curve to the age and compressive strength was analyzed. The results show that when the age of grouting material is ≥14 days or the compressive strength of grouting material is ≥60 MPa, the strength test curve of grouting material established by the method in DB32/T 3754—2020 is more applicable, which can provide a reference for the selection of the testing time of the solid compressive strength of different grouting materials in practical projects.
赵建华,谢慧晟,张建宇,等.灌浆料测强曲线对龄期与抗压强度的适用性研究[J].混凝土与水泥制品,2023(4):85-87,92. ZHAO J H,XIE H S,ZHANG J Y,et al.Study on the Applicability of Grouting Material Strength Curve to Age and Compressive Strength[J].China Concrete and Cement Products,2023(4):85-87,92.

节能降碳

不同加热方式下高温后防辐射混凝土的性能研究
不同加热方式下高温后防辐射混凝土的性能研究
  • 王若祥1,陈振富1,2,*,陶秋旺1,谢利平3
2024年第3期
摘要
引用本文
摘   要:以磁铁矿为骨料制备了防辐射混凝土,研究了不同加热方式(微波辐射加热、马弗炉加热)和温度(25~800 ℃)对防辐射混凝土外观形貌、抗压强度、超声波波速和屏蔽性能的影响。结果表明:在相同加热方式下,随着温度的升高,试件的外观形貌劣化程度加重,抗压强度、超声波波速、屏蔽性能均降低;与马弗炉加热相比,微波辐射加热在各个温度区间内对试件造成的损伤均较大。 Abstract: Radiation shielding concrete was prepared by using magnetite as aggregates, and the effects of different heating modes (microwave radiation heating, muffle furnace heating) and temperatures (25~800 ℃) on the apparent morphology, compressive strength, ultrasonic wave velocity, and shielding performance of radiation shielding concrete were studied. The results show that under the same heating mode, as the temperature increases, the deterioration degree of the apparent morphology of the specimen increases, and the compressive strength, ultrasonic wave velocity, and shielding performance of the specimen decrease. Compared with muffle furnace heating, microwave radiation heating causes greater damage to the specimen in various temperature ranges.
王若祥,陈振富,陶秋旺,等.不同加热方式下高温后防辐射混凝土的性能研究[J].混凝土与水泥制品,2024(3):79-83,89. WANG R X,CHEN Z F,TAO Q W,et al.Study on properties of radiation shielding concrete after high temperature under different heating modes[J].China Concrete and Cement Products,2024(3):79-83,89.
粉煤灰基地聚物混凝土的抗氯盐侵蚀性能研究
粉煤灰基地聚物混凝土的抗氯盐侵蚀性能研究
  • 谭 云
2024年第3期
摘要
引用本文
摘   要:对比研究了氯盐侵蚀0~360 d内,粉煤灰基地聚物混凝土(以下简称FABGC)与普通混凝土(以下简称OPC)的抗压强度、质量损失率、氯离子含量、氯离子扩散系数、微观结构。结果表明:各侵蚀龄期下,OPC的抗压强度、质量损失率、氯离子含量基本均高于FABGC;随着侵蚀龄期的增加,FABGC和OPC的抗压强度、氯离子扩散系数基本呈下降趋势,质量损失率、氯离子含量呈增大趋势;当侵蚀龄期达到60 d后,OPC的抗压强度损失率、质量损失率和氯离子扩散系数均明显高于FABGC;随着侵蚀深度的增加,FABGC与OPC氯离子含量逐渐降低;与FABGC相比,未受氯盐侵蚀时,OPC的微观结构更致密,但受氯盐侵蚀后,OPC的微观结构劣化速率较快。 Abstract: The compressive strength, mass loss rate, chloride ion content, chloride diffusion coefficient, and microstructure of fly ash based geopolymer concrete (FABGC) and ordinary concrete (OPC) were investigated comparatively in the chlorine salt erosion environment during 0~360 d. The results show that the compressive strength, mass loss rate, and chloride ion content of OPC are basically higher than those of FABGC at each erosion age. With the increase of erosion age, the compressive strength and chloride ion diffusion coefficient of FABGC and OPC basically show a decreasing trend, and the mass loss rate and chloride content show an increasing trend. When the erosion age reaches 60 d, the compressive strength loss rate, mass loss rate, and chloride ion diffusion coefficient of OPC are significantly higher than those of FABGC. With the increase of erosion depth, the chloride ion content of FABGC and OPC gradually decreases. Compared with FABGC, the microstructure of OPC is denser when it is not subjected to chloride salt erosion environment, but the microstructure deterioration rate of OPC is faster when it is subjected to chloride salt erosion environment.
谭云.粉煤灰基地聚物混凝土的抗氯盐侵蚀性能研究[J].混凝土与水泥制品,2024(3):84-89. TAN Y. Study on chloride corrosion resistance of fly ash based geopolymer Concrete[J].China Concrete and Cement Products,2024(3):84-89.
火山渣粒径和DPS掺量对轻骨料混凝土性能的影响
火山渣粒径和DPS掺量对轻骨料混凝土性能的影响
  • 刘宏波1,2,张少云1,张博洋1,李 泳1,常 璞1,孙 婧1,2,*
2024年第3期
摘要
引用本文
摘   要:以火山渣作为粗骨料制备了轻骨料混凝土,研究了火山渣粒径(4.75~9.50、4.75~19.00、4.75~26.00 mm)对轻骨料混凝土坍落度、吸水率和抗压强度的影响,优选出了最佳火山渣粒径。在此基础上,研究了渗透结晶型无机防水剂(DPS)的掺量(0、0.6%、0.8%、1.0%)对轻骨料混凝土性能的影响,并分析了其作用机理。结果表明:随着火山渣粒径的增大,轻骨料混凝土的坍落度降低,吸水率增大,抗压强度先增大后减小,最佳火山渣粒径为4.75~19.00 mm;随着DPS掺量的增加,轻骨料混凝土的坍落度和吸水率降低,抗压强度增大;掺入适量DPS可以有效提高混凝土基体的密实度,从而改善混凝土的性能。 Abstract: Lightweight aggregate concrete was prepared by using volcanic slag as coarse aggregates, and the influence of volcanic slag particle size (4.75~9.50、4.75~19.00、4.75~26.00 mm) on the slump, water absorption, and compressive strength of lightweight aggregate concrete was studied, and the optimal volcanic slag particle size was selected. On this basis, the influence of the content of penetrating crystalline inorganic waterproofing agent (DPS) (0, 0.6%, 0.8%, 1.0%) on the performance of lightweight aggregate concrete was studied, and its mechanism of action was analyzed. The results show that as the particle size of volcanic slag increases, the slump of lightweight aggregate concrete decreases, the water absorption rate increases, and the compressive strength first increases and then decreases, and the optimal particle size of volcanic slag is 4.75~19.00 mm. With the increase of DPS content, the slump and the water absorption rate of lightweight aggregate concrete decrease, and the compressive strength increases. Adding an appropriate content of DPS can effectively improve the compactness of the concrete matrix, thereby improving the performance of the concrete.
刘宏波,张少云,张博洋,等.火山渣粒径和DPS掺量对轻骨料混凝土性能的影响[J].混凝土与水泥制品,2024(3):90-92,98. LIU H B,ZHANG S Y,ZHANG B Y,et al.Effect of volcanic slag particle size and DPS content on performance of lightweight aggregate concrete[J].China Concrete and Cement Products,2024(3):90-92,98.
柠檬酸对氯氧镁水泥水化过程及性能的影响
柠檬酸对氯氧镁水泥水化过程及性能的影响
  • 喻 俊1,廖国胜1,2,3,陈迎雪1,刘艳玲1,董兴智1,程利力1,廖宜顺1,2,3,*
2024年第3期
摘要
引用本文
摘   要:研究了不同掺量(0、0.2%、0.4%、0.6%、0.8%)的柠檬酸对氯氧镁水泥(MOC)凝结时间、抗压强度、电阻率、体积稳定性和耐水性的影响,并通过XRD和SEM分析了其作用机理。结果表明:掺入柠檬酸会延长MOC的凝结时间和水化诱导期,延缓水化进程,降低抗压强度,但能有效改善MOC的体积稳定性和耐水性;掺入柠檬酸会使MOC水化产物5Mg(OH)2·MgCl2·8H2O(相5)的含量增加,晶体形态改变;空白组浸水28 d后,其内部生成了大量片状Mg(OH)2;掺柠檬酸的试件浸水28 d后,其内部疏松多孔的Mg(OH)2较少,大量絮状相5相互搭接,使MOC的内部结构更加致密,耐水性得到提升。 Abstract: The effects of different contents of citric acid (0, 0.2%, 0.4%, 0.6%, 0.8%) on the setting time, compressive strength, electrical resistivity, volume stability, and water resistance of magnesium oxychloride cement(MOC) were studied, and the mechanisms were analyzed by XRD and SEM. The results show that adding citric acid can prolong the setting time and hydration induction period of MOC, delay the hydration process, reduce compressive strength, but effectively improve volume stability and water resistance. The addition of citric acid increases the content of MOC hydration product Mg(OH)2·MgCl2·8H2O (phase 5) and changes its crystal morphology. After being immersed in water for 28 d, a large amount of flaky Mg(OH)2 is generated inside the blank group. After being immersed in water for 28 d, the specimens mixed with citric acid show less loose and porous Mg(OH)2 inside, and a large amount of flocculent phase 5 overlaps with each other, making the internal structure of MOC more dense and improving its water resistance.
喻俊,廖国胜,陈迎雪,等.柠檬酸对氯氧镁水泥水化过程及性能的影响[J].混凝土与水泥制品,2024(3):93-98. YU J,LIAO G S,CHEN Y X,et al.Effect of citric acid on hydration process and performance of magnesium oxychloride cement[J].China Concrete and Cement Products,2024(3):93-98.
搅拌站废浆对砂浆流动度和力学性能的影响
搅拌站废浆对砂浆流动度和力学性能的影响
  • 孙 浩,于林玉,刘万刚
2024年第3期
摘要
引用本文
摘   要:为了实现搅拌站废浆的再利用,研究了不同含固量(3%~15%)废浆等质量取代0~100%的水对砂浆流动度及力学性能的影响。结果表明:废浆中存在的C3S、C2S等矿物成分使其具备在混凝土中应用的可行性;随着废浆掺量的增加,砂浆的流动度基本呈减小趋势;废浆的掺入能在一定程度上使砂浆的微观结构更密实,从而提高砂浆的力学性能,尤其是28 d抗压强度。 Abstract: In order to realize the reuse of waste slurry from mixing plants, the effects of replacing 0~100% water by waste slurry with different solid content (3%~15%) on the fluidity and mechanical properties of mortar were investigated. The results show that the existence of C3S, C2S and other mineral components in the waste slurry makes it feasible to be applied in concrete. With the increase of the replacement rate of waste slurry, the fluidity of mortar basically shows a decreasing trend. The incorporation of waste slurry can make the microstructure of mortar denser to a certain extent, so as to improve the mechanical properties of the mortar, especially the 28 d compressive strength.
孙浩,于林玉,刘万刚.搅拌站废浆对砂浆流动度和力学性能的影响[J].混凝土与水泥制品,2024(3):99-102. SUN H,YU L Y,LIU W G.Effect of waste slurry from mixing plant on fluidity and mechanical properties of mortar[J].China Concrete and Cement Products,2024(3):99-102.

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珊瑚碎屑混凝土的强度特性及破坏形态分析
珊瑚碎屑混凝土的强度特性及破坏形态分析
  • 王 磊1,2,范 蕾1,2
2015年第1期
摘要
引用本文
摘   要:针对目前对珊瑚碎屑混凝土的力学机理尚不清晰这一问题,对不同龄期和水灰比的珊瑚混凝土试块进行了试验研究。试验结果表明,珊瑚混凝土具有早强、快硬的特点;同时,当水灰比减小到一定程度后,单纯减小水灰比并不能明显提高珊瑚混凝土的抗压强度。本文从材料特性、界面特性以及龄期和水灰比等方面着手,对珊瑚混凝土的强度特性作了详细分析,并介绍了珊瑚混凝土的破坏形态,从而可为珊瑚碎屑应用于海岛混凝土工程提供一定的参考依据。 Abstract: Currently, the mechanical mechanism of coral debris concrete is not well understood, so the research on coral concrete test block in different age and water cement ratio is carried out. The test results show that coral concrete has the characteristics of fast strengthening and hardening, and when the water cement ratio decreases to a certain extent, simply reducing the water cement ratio could not result in obvious additions of compressive strength of coral concrete. From the aspects of material properties, interface properties,age and water cement ratio, the strength characteristics of the coral concrete are analyzed in detail, and the failure pattern is introduced, which can provide reference for application of coral debris in island concrete engineering.
王磊,范蕾. 珊瑚碎屑混凝土的强度特性及破坏形态分析[J].混凝土与水泥制品,2015(1):1-4. WANG L,FAN L.Strength Characteristic and Failure Pattern Analysis on Coral Debris Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(1):1-4.
装配式结构用高强套筒灌浆料性能试验研究
装配式结构用高强套筒灌浆料性能试验研究
  • 汪秀石,杨智良,吴照学
2015年第2期
摘要
引用本文
摘   要:研究了装配式结构用高强套筒灌浆料的性能,通过试配并进行了流动度、强度和膨胀性试验,优选出了优化配合比。同时基于优化配合比进行了水胶比、减水剂掺量和膨胀剂掺量对高强套筒灌浆料性能影响的研究。试验结果表明,随着水胶比(W/B)增加,流动度逐渐增大,但强度随W/B增加呈现明显降低趋势;减水剂可有效改善流动度,而当掺量过多时对强度有一定的影响;膨胀率随膨胀剂掺量增加呈现增长趋势,但当掺量小于8.0%时,膨胀效果较差,掺量大于12.0%时,对流动度和强度产生不利影响。 Abstract: The properties of high-strong cementitious grout for prefabricated concrete structure are studied, and the optimum mix proportion is elected by the tests of fluidity, strength and expansibility. The roles of W/B and the content of superplasticizer or expanders in high-strong cementitious grout for coupler are researched respectively based on the optimum mix proportion. The test results show that the fluidity of the grout increases with the increasing of W/B, but its strength has significantly decreasing trend; the fluidity of the grout can be improved effectively by superplasticizer, but its strength will decrease if superplasticizer content is excessive; expansion rate of the grout increases with the increasing of expanders agent content, but the expansibility is poor when the content is less than 8.0%, and it has an adversely affect on the liquidity and strength of the grout when the content is greater than 12.0%.
汪秀石,杨智良,吴照学.装配式结构用高强套筒灌浆料性能试验研究[J].混凝土与水泥制品,,2015(2):65-68. WANG X S,YANG Z L,WU Z X.Experimental Research on Performance of High-strong Cementitious Grouting for Prefabricated Concrete Structure[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(2):65-68.
再生粗骨料强化处理工艺对再生混凝土性能的影响
再生粗骨料强化处理工艺对再生混凝土性能的影响
  • 郭远新,李秋义,孔 哲,岳公冰,韩 帅
2015年第6期
摘要
引用本文
摘   要:分别采用物理强化、化学强化和物理-化学复合强化三种不同的强化方式对简单破碎再生粗骨料进行强化处理,并采用100%取代天然碎石制备再生粗骨料混凝土,研究了不同强化处理后的再生粗骨料对混凝土工作性能、力学性能、抗渗透性能和抗碳化性能的影响。结果表明,经过强化处理的再生粗骨料混凝土的各项性能均有不同程度的提高,其中经二次物理强化处理后的再生粗骨料混凝土的用水量较天然碎石混凝土仅增加了6kg/m3,其抗压强度也达到最高值,接近于天然碎石混凝土;经二次物理强化和化学浸渍复合强化处理后的再生混凝土氯离子扩散系数降低了13.6%;三种不同的强化方式处理后,再生混凝土的碳化深度和碳化速度均有所降低。 Abstract: Three kinds of different strengthening technologies of physical enhancement, chemical enhancement and physical-chemical compound enhancement to strengthen the simple crushing recycled coarse aggregate are adopted, with 100% replaced natural gravel preparation of recycled coarse aggregate concrete, and the influences of the recycled coarse aggregate of different strengthening treatment on the working performance, mechanical properties, penetration resistance and carbonation resistance of concrete are studied. The research results show that, through strengthening treatment, recycled coarse aggregate concrete properties are improved to different degrees, the water consumption of recycled coarse aggregate concrete after the secondary physical strengthen treatment is only increased by 6kg/m3 than that of natural gravel concrete. The compressive strength also reached the highest value, close to the natural gravel concrete. The chloride ion diffusion coefficient of recycled concrete after the secondary physical-chemical compound strengthening treatment is reduced by 13.6%. The depth of carbonation and carbonation velocity decrease after three kinds of different strengthening treatments.
郭远新,李秋义,孔哲,等.再生粗骨料强化处理工艺对再生混凝土性能的影响[J].混凝土与水泥制品,2015(6):11-17. GUO Y X,LI Q Y,KONG Z,et al.Influence of Strengthening Treatment Technology of Recycled Coarse Aggregate on Performance of Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(6):11-17.
无砂再生透水混凝土配合比设计
无砂再生透水混凝土配合比设计
  • 张松涛1,贾欣悦2,宋 卓1,贾艳东1
2016年第12期
摘要
引用本文
张松涛,贾欣悦,宋卓,等.无砂再生透水混凝土配合比设计[J].混凝土与水泥制品,2016(12):6-12. ZHANG S T,JIA X Y,SONG Z,et al.Design on Mix Proportion of No-fines Pervious Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2016(12):6-12.
清水混凝土概念、研究现状、存在问题及配合比设计方 综述
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  • 郭 伟1,路林海2,王龙志3,崔 鑫3,王桂玲4,张海霞3
2016年第10期
摘要
引用本文
摘   要:20世纪90年代后期以来,清水混凝土研究及工程应用得到了长足发展,许多城市建成了清水混凝土标志性工程。为了更好地促进清水混凝土研究的深入、工程质量的提高,对清水混凝土的概念、研究现状、存在问题及现有的清水混凝土配合比设计方法进行了系统地梳理、总结。通过对清水混凝土现状的研究,可使相关领域技术人员认识到清水混凝土发展中存在的不足、明确清水混凝土的研究方向,以实现清水混凝土技术研究水平的再提高,有力地支持清水混凝土工程应用的进一步推广。 Abstract: Since the late 1990s, research and application of fair-faced concrete has made considerable progress, many cities built landmark projects of fair-faced concrete. In order to better promote the study in-depth and the engineering quality improvement of fair-faced concrete, the concept, research status, existing problems and mixture design methods of fair-faced concrete are systematically reviewed and summarized. Through the above study of fair-faced concrete, the relevant technicians recognize the lack of fair-faced concrete in the development and realize a clear research direction, in order to improve research level, strongly support further promotion of fair-faced concrete in engineering applications.
郭伟,路林海,王龙志,等.清水混凝土概念、研究现状、存在问题及配合比设计方法综述[J].混凝土与水泥制品,2016(10):23-27. GUO W,LU L H,WANG L Z,et al.Summary for Concept, Research Status, Existing Problems and Mix Proportion Design of Fair-faced Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2016(10):23-27.
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新型装配式建筑构件生产及其施工技术的研究与应用
  • 范 玉1,4,徐 华2,黄 新3,黄继战4,马北京4
2015年第12期
摘要
引用本文
摘   要:通过对建筑PC构件的设计、生产、施工进行的研究,对建筑PC构件进行了再设计及优化,确定了合理的PC构件生产及其施工工艺方案,并对影响PC构件质量的相关因素进行了分析。 Abstract: Through the research on design of PC component, production and construction,  construction PC component is carried out for re-design and optimization. The reasonable PC component production and construction technology program are determined, and factors affecting the quality of PC are analyzed.
范玉,徐华,黄新,等.新型装配式建筑构件生产及其施工技术的研究与应用[J].混凝土与水泥制品,2015(12):87-89. FAN Y, XU H,HUANG X,et al.Research and Application of Production for New Type of Prefabricated Construction Component and Its Construction Technology[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(12):87-89.
石墨烯纳米片对水泥基复合材料力学性能的影响
石墨烯纳米片对水泥基复合材料力学性能的影响
  • 王 辉,刘爱红,李 航
2015年第12期
摘要
引用本文
摘   要:采用球磨法将石墨烯纳米片分散在水泥基体中,研究了石墨烯纳米片掺量对水泥基材料抗折强度和抗压强度的影响。实验结果表明,适量的石墨烯纳米片可均匀分散在水泥基体中,通过桥联效应和拔出效应对水泥基材料起增强增韧作用,当石墨烯纳米片掺量为0.04%时,石墨烯纳米片与水泥基体界面结合良好,没有明显过渡层,试件3d抗折强度和抗压强度分别提高了22.84%和23.61%。 Abstract: Graphene nanoplatelets (GNPs) were dispersed in the cement matrix by milling method. The effect of GNPs with different contents on the flexural strength and compressive strength of composites were studied. The results showed that well dispersed GNPs improved the mechanical properties of cement composites, owing to GNPs excellent pulling-out and bridging capability. When the GNPs content was 0.04%, the mechanical properties of cement composites were increased obviously. Its flexural and compressive strength increased by 22.84% and 23.61% respectively compared with the referee sample after curing 3 days. The interface between graphene nanoplatelets and cement was bonded well, with no obvious transition layer.
王辉,刘爱红,李航.石墨烯纳米片对水泥基复合材料力学性能的影响[J].混凝土与水泥制品,2015(12):25-27. WANG H,LIU A H,LI H.Influence of Graphene Nanoplatelets on Mechanical Properties of Cement-based Composites[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(12):25-27.
大型智能PC构件自动化生产线简介
大型智能PC构件自动化生产线简介
  • 孙 红1,孙 健1,吴玉厚1,赵凯军2
2015年第3期
摘要
引用本文
摘   要:根据混凝土工厂化生产的需要,阐述了大型智能PC构件生产线的组成部分、工艺过程和技术重点;分析了该生产线中蕴含的微观物流、信息采集、分布式控制及多智能体的协同过程,总结了PC构件生产线的优点和技术创新突破点,可为大型智能PC构件全自动生产线的研制提供理论基础和技术依据。 Abstract: According to the needs of the concrete factory production, the large scale intelligent automatic PC production line the technological process and technical keys of PC component are introduced, the cooperative process of microscopic logistics, information acquisition, distributed control and multi-agent systems are analyzed, the advantages and technology innovation of PC components production line are summarized, which can provide theoretical basis and technical basis for large scale intelligent automatic production line of PC components.
孙红,孙健,吴玉厚,等.大型智能PC构件自动化生产线简介[J].混凝土与水泥制品,2015(3):45-48. SUN H,SUN J,WU Y H,et al.Introduction of Large Scale Intelligent PC Automatic Production Line[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(3):45-48.
建筑垃圾再生微粉的研究现状
建筑垃圾再生微粉的研究现状
  • 毛新奇1,2,屈文俊1,朱 鹏1
2015年第8期
摘要
引用本文
摘   要:建筑垃圾再生微粉各项性能的研究是推进建筑垃圾资源化的重要基础。根据近年来国内关于再生微粉的主要研究成果,对材料来源、制备工艺、工作性能、力学性能和耐久性能等方面进行了综述,并对相关的影响因素进行了探讨分析。 Abstract: Research on the properties of utilization regeneration of powder for construction waste is the important foundation of resource utilization of construction waste. Based on the recent domestic research on recycled powder, material source, manufacturing process, workability, mechanical properties and the durability are reviewed. Besides, the related influence factors are discussed and analyzed.
毛新奇,屈文俊,朱鹏.建筑垃圾再生微粉的研究现状[J].混凝土与水泥制品,2015(8):89-93. MAO X Q,QU W J,ZHU P.Study Status of Recycled Powder for Construction Waste[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(8):89-93.
再生粗骨料及再生混凝土性能研究进展
再生粗骨料及再生混凝土性能研究进展
  • 甘 福1,周脉席1,3,濮 琦2
2018年第9期
摘要
引用本文
摘   要:结合国内外再生粗骨料混凝土的研究现状,综述了再生粗骨料性能、再生粗骨料混凝土性能、再生混凝土改性方法及改性后的混凝土性能等方面内容,展望了再生粗骨料及再生混凝土未来研究方向。 Abstract: Combining the study of recycled coarse aggregate concrete at home and abroad, the property of recycled coarse aggregate, the performance of recycled coarse aggregate concrete, the modified method of recycled concrete and the performance of modified concrete are reviewed, and the fature research direction on recycled coarse aggregate and recycled concrete is prospected.
甘福,周脉席,濮琦.再生粗骨料及再生混凝土性能研究进展[J].混凝土与水泥制品,2018(9):102-107. GAN F,ZHOU M X,PU Q.Research Progress of Performance of Recycled Coarse Aggregate and Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2018(9):102-107.
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版权所有:中国混凝土与水泥制品网

苏ICP备10086386号

网站建设:中企动力 苏州